The Linux virtio_blk.ko guest driver is removing legacy SCSI passthrough support. Deprecate this feature in QEMU too. Signed-off-by: Stefan Hajnoczi <stefanha(a)redhat.com&gt; --- qemu-deprecated.texi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi index 4b4b7425ac..ef94d497da 100644 --- a/qemu-deprecated.texi +++ b/qemu-deprecated.texi @@ -285,6 +285,17 @@ spec you can use the ``-cpu rv64gcsu,priv_spec=v1.9.1`` command line argument. @section Device options +@subsection Emulated device options + +@subsubsection -device virtio-blk,scsi=on|off (since 5.0.0) + +The virtio-blk SCSI passthrough feature is a legacy VIRTIO feature. VIRTIO 1.0 +and later do not support it because the virtio-scsi device was introduced for +full SCSI support. Use virtio-scsi instead when SCSI passthrough is required. + +Note this also applies to ``-device virtio-blk-pci,scsi=on|off'', which is an +alias. + @subsection Block device options @subsubsection "backing": "" (since 2.12.0)

On Fri, Dec 13, 2019 at 15:56:08 +0100, Paolo Bonzini wrote: > On 13/12/19 15:46, Stefan Hajnoczi wrote: > > The Linux virtio_blk.ko guest driver is removing legacy SCSI passthrough > > support. Deprecate this feature in QEMU too. > > > > Signed-off-by: Stefan Hajnoczi <stefanha(a)redhat.com&gt; > > --- > > qemu-deprecated.texi | 11 +++++++++++ > > 1 file changed, 11 insertions(+) > > > > diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi > > index 4b4b7425ac..ef94d497da 100644 > > --- a/qemu-deprecated.texi > > +++ b/qemu-deprecated.texi > > @@ -285,6 +285,17 @@ spec you can use the ``-cpu rv64gcsu,priv_spec=v1.9.1`` command line argument. > > > > @section Device options > > > > +@subsection Emulated device options > > + > > +@subsubsection -device virtio-blk,scsi=on|off (since 5.0.0) > > + > > +The virtio-blk SCSI passthrough feature is a legacy VIRTIO feature. VIRTIO 1.0 > > +and later do not support it because the virtio-scsi device was introduced for > > +full SCSI support. Use virtio-scsi instead when SCSI passthrough is required. > > + > > +Note this also applies to ``-device virtio-blk-pci,scsi=on|off'', which is an > > +alias. > > + > > @subsection Block device options > > > > @subsubsection "backing": "" (since 2.12.0) > > > > Reviewed-by: Paolo Bonzini <pbonzini(a)redhat.com&gt; Libvirt still allows and exposes this configuration: <disk type='block' device='lun'> <driver name='qemu' type='qcow2'/> <source dev='/dev/sdfake2'/> <target dev='vdb' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> which results into the following command line: -drive file=/dev/sdfake2,format=qcow2,if=none,id=drive-virtio-disk1 \ -device virtio-blk-pci,scsi=on,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,\ id=virtio-disk1 In this case I don't see any possibility how to fix it since it requires change of controller.